Door operating and locking device



INVENTOX. 56/224 fiaeo zc/rer L B Y M. ATT NE Y5.

F. A. BOEDTCHER DOOR OPERATING AND LOCKING DEVICE Filed Aug 30, 1924 May 28, 1929.

Patented May 28, 1929 I 1,714,7 1? N CEQ FRANZ A. iaonij rorrnraor IBERGENFIELD, NEW JERSEY, Assisi-Non T0 was iirrinva ror t COMPANY, or JERSEY orcrmflvnw JERSEY,

noon OPERATING Ann LOOKING C A CORPORATION OF NEWJJERSEY r Application filed August 30, 1924. Serial No. 735,094.

This invention relates to apparatus for the operation and locking of the floor doors installed at the various floors of an elevator shaft; It is desirable in this type of-door to pro vide simple and efiicient meansffor sliding the door from open to closed position and vice versa,while an'el'evator is at a corresponding floor, but it is also essential that these doors be so looked that when an elevator leaves the floor, they cannot be opened by a prospective passenger on the outside of the door to permit of accident hazards. e

In accordance with the present invention, I provide a double safeguard against the leaving of floo'rdoors unlocked and accomplish this result throughthe employment of improved mechanism. In its preferred practioal form, the invention embodies a toggle, the terminal of one link of which is pivoted to the door casing and the other link of which is pivoted intermediate its ends to the door. Adjacent the end of the link, which is pivoted to the door, is a suitable handle by means of which'the toggle may be flexed to impart sliding movement' to the'door. Associated with the door is a latch and on the manually operable link adjacent the handle is a stop or keeper, preferably a stepped keeper, comprising a plurality of shoulders or stops and with these shoulders the latch'is adapted to cooperate. 1 V When the toggle is flexed to close the door and approaches a position of alinement of these links, the latch is adapted to traverse the shoulders of the keeper in succession and if the door is completely closed the latch will engage with the last step to lock the door-in closed position. If however the door is not completely closed, the latch will engage with one of the other shoulders so that eventhough the door is not wholly closed, it will nevertheless be locked against further opening. I

also associate with the toggle as a precautionary measure a switch which is included in the elevator controlling circuit or some other circuit on which the operation of the elevator is dependent and so organize the parts that this switch will not be closed unless the toggle is in a position to fully close the door. I thus not only providefor a locking of the door against opening from either a closed or partially closed condition, but also make it impo'ssible'for the elevator to leave the floor until the door hasv locked. I my April 25, 1922, combination door locking and circuit controlling device, these same general conditions are prevalent, but the present inventio'nis an improvement onthe prior one, is more easilyoperable by the car operator and is foundto give better results in practice. V

Aside from the precautionary measures which have been adverted to, the invention furtherembodies the utilization of a cushion.- ing device cooperating with the toggle to preclude slamming of the door.

Features of the invention, other than those specified, will-be apparent from' the hereins and I claims, when the accompanying v been ,fully closed and prior'Patent No. 1,413,570, issued stood as illustrative, only, and not as defining the limits of the invention. Figure 1 shows the present invention as =sociated with an elevator door.

ure the parts positions which they occupy when the door is closed and in dotted lines the position whichthey occupy whenthedoor is partially open. r Referring to the drawing, 1 designates a sliding shaft doorof anelevatorinstallation.. 2 1s a toggle comprisingtwo links3 and 4 pivoted together at the elbow'ofthe toggle at 5. The free end of the link 3 is pivoted In this figare shown in full lines in the to the door casing at 6,1while the link 4' is pivoted'intermediate its ends as at 7 to a plate 8 fixed on the door 1. At the free end of the link t is provided a handle 9 adapted to be grasped by the-operator. who applies force thereto for t-he'purpose of flexing the toggle. When the toggle is in distended con:- dition with the links alinement, the door will be closed, but if force is applied to the handle to flexthe tog- 3iand 4 in substantial gle,the door will be slid into an open posi= 1 tion during which travel thelinks ofthe toggle will partake" of the dotted line positions shown in Figure 1. Through the operation of. the toggle, the doormay thus be slidfrom opent'o closed position and vice versa, a stop 10 mounted on the plate 8 serving to preclude overtravel of the toggle during the closing ofthedoorl 1 V lvlounted onthe plate 8 is a latch or detent 11 pivoted at 12 to the plate and cooperating with a limiting pin 13 which works in a slot 14 in the latch. The-latch is pivoted to the plate 8 off center andthus normally gravitates into a positionwherein the upper end or the slot 14 will bearagainst the limiting pin 1.3. A finger piece or knob 15 formed on the .latch allows of its ready manipulation. On the link 4: of the toggle and mounted in latch'fis a keeper 16, shown as such position ;as to abe -.c,ooperable with the twoshoulders l7 and 18 although more than two shouldersmay beprovided.

'The parts are-so assembled thatas the toggle moves from the position shown lnidotted lines in. Lliligure 11 .to the distended position, the keeper will be brought into engagement with the inclined. surface 19 of the ilatchand will ,force the latch back against gravity unti-lthekeeper ,passes by the nose of .the latch,

during which operation the shoulders 18 and 17 will pass the noseof the latch in succession. If closing movementiof the door ceasesafter the nose of the latch .has passed the shoulder 18 ,ibutb,efore it has reached the shoulder 17 the latch will engage with the shoulder 18 and will lock the door against the opening hya person on-the other side of the door, so that even though the elevator proceed leaving the door slightly ajar, the door will zhe. left in a safe condition. However to insure that the door be entirely closed beforethe elevator leaves .the'fioor, I pref- I eraablyassociate with the ,toggle'a switch 20.

,This switch is mounted on the door Leasing and a controlling arm 21=ofthe switch secured to the toggle by Theswitch is so \constituted'that it will be closed only when the toggle is in a position ,In practice. the cushioning device may be pneumatmally I or springcontrolled oria combination of these two, but in either event its functions toecheck the movement of the'toggleias'it approachesits maximum destination sothatlit will not comeltoan abrupt stop against the .stop 10. This construction obviates annning of the toggle and consequent slamming oi? the door. 1 i 7 ,To open the door, the car operator places the tips 'offour fingers on the upper surface to slide the door into open position.

formed with means of a link .22.

of. the handle .9 and withithe thumb of the same hand presses the finger piece 15 upwardly to disengage the latch from the keeper while simultaneously applying 'adownward pressure on the handle *9. lhe' keeper will thus be released and the -'togg1e flexed To close the door, the direction of pressure on ,thehandle t) isreversed, but no attention need be paid to the latch since, acting under the force :ofgravity, it will automatically :re-engage the keeper and lock the toggle against, inadvertent flexing.

An important feature'inherent in theg-us e of the latch and keeper in connection with the itoggle is that it will positively St0,p;1-.e bound of the toggle .and this important .as

such rebound would otherwiseflinvarialoliy leave the door LkIl slightly .open condition; This .cann ot possibly occur when zthe grayity latch isemployed.

The ma n is preferablytalgraiitylatch as described, but, if desired, l-mayemplqy :a spring actuated latch. Accordingly, the invention is -.to beunderstood as not limited to the details oii constructiondescribed .but'is to be construed as broadly novel .as .iseommensurate with the zappenidedclaims.v

Having thus fully described the invention, what l claimas new and desire to .securelby Letters Patent is: v V

1. An assembly of thecharacter described embodying'adoor amounted lior. slidingrmovement, a toggle,one end of one link .of which is pivoted to arelativelystationary pivotand the other link Ibeing pivoted to .the ldooll, a

shoulder formed on the .lastmentioned lilik, and-a latch .mounted on the door and adapted to automatically gravitate Ii-nto flocking ,relation with the shoulderlodf. said linkas the inggle 'is moved into distendedcondition to close the door. A

2." An assembly of the character described embodying a doormounted for s'lijdingmove ment, a toggle, one end of one link o'if whic'h ispivoted to a relativelyrstationary ipivotand the other link being pivoted to the door, a

shoulder carried by the last mentioned link and a latch mounted on the door-and :pos'itioned to automatically come into -locking relation with the shoulder of said link as the toggle ismoved into distended condition to close the door. I

3. An assembly of the characterdescribed embodying a door mounted-for sliding movement, a toggle, one end of one link of which is pivoted to a relatively stationary pivot and the otherjlink being pivoted intermediate its ends to the door, a succession of shoulders formed on the last finentio'ned link, and a latch mounted on the door and'adaptedto au tomatically come into "locking engagement withsaid shouldersin succession as the teggle is moved-into distended condition 'toiclose the door.

4. An assembly of the character described embodying a door mounted-for. sliding movement, a toggle comprising two links, the con tlguous ends of WhlCh are plvoted to one another, a pivot for securing the free end of adapted to automatically and positively engage the stop when the door is closed to lock the toggle against flexing, said latch being positioned to be. manually released by the 1 5 hand of an operator while said hand is gripping the handle, topermit opening of the door. v V

Intestimohy whereof I have signed the foregoing specification.

FRANZ A. BOEDTOHER. 

